Keywords
Abstract
The article presents the results of studies on the assessment of the effect of mineral nutrition systems when using domestically produced fertilizers of Shchelkovo Agrokhim JSC on the productivity and crop quality of wine grape varieties in the soil and climatic conditions of Crimea. Our studies prove the positive effect of the nutrition systems under study on phytometric indicators of grapes. An increase in the growth of grape bushes was observed in the experimental plots of ‘Merlot’ (9.4%), ‘Chardonnay’ (13.6%) and ‘Kefesiya’ (16.4%) grape varieties in comparison with the same indicator in the control. It was found that the use of foliar top dressing during the growing season of grape plants contributed to an increase in the average bunch weight in the experiments by 8.7–27.6 g (7.2–20.1%) and, as a consequence, an increase in the cropping capacity by 0.5–1.6 t/ha (6.9–15.5%). Against the background of consistent application of fertilizers, an increase in the concentration of sugars in grape must was observed on grape varieties ‘Merlot’ by 15 g/dm3, ‘Bastardo Magarachskiy’ - by 17 g/dm3, and ‘Bastardo’ - by 12 g/dm3 in comparison with the control. Against the background of a significant increase in the productivity and crop quality of wine grape varieties on experimental variants and controls when using the studied nutrition systems, no negative effect of these agrochemicals on physicochemical indicators of grapes and wines was observed.